Through the 1980's, Studio Ghibli maestro Hayao Miyazaki drafted a series of manga shorts for the magazine Model Graphix. These short comics were routinely set in the era preceeding World War I and featured fantastic inventions usually of Miyazaki's own creation, invariably staffed by the artist's trademark anthropomorphic pigs.
Usually, but not always. One story, The Pride of Steel, is about the American Civil War ironclads Monitor and Merrimack. Another, The Eyes of a Farmer, was based on Andre Malreaux's autobiography L'Espoir. However, it also reprints The Age of the Flying Boat, which was later adapted to film as Porco Rosso. Miyazaki also wanted to adapt Enter the Multigun Tower, but had to settle for a scale model of the tank, sold at the Studio Ghibli Museum.
The collected anthology of these stories, Hayao Miyazaki's Daydream Note, is not hard to find in Japan. Along with the expensive model of that aforementioned tank, one can pick up a copy of the book at the museum. In the West, the story may be different. As a sampling for deprived eyes, the following is the first story in the collection, The Unknown Youngest Brother of the Giants.